NiteCrawler .
123 posts
Apr 16, 2011
6:54 AM
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A quick ques. for those in the know;I have an original Meteor with the 2 ten,one twelve speaker config.and was curious what a fifteen would sound like so I alligator clipped a speaker wire from the back of the twelve into the fifteen.The ques.is can I do any damage to the amplifier by doing this?Btw it sounds pretty darn awesome,it has a bigger,fuller low end,but of coarse before continuing with this set up I wanted to make sure that I,m not doing any damage to my amp.Thanks for any responses.
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jimr
8 posts
Apr 16, 2011
9:19 AM
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I think the Meteor uses 8 ohm impedance speakers in parallel. Look in the back at the speaker label on the rim for the impedance . If so, adding an additional 8 ohm speaker will pose no problem as the total impedance with change from 2.6 to 2 ohm, insignificant. Take care to maintain the same polarity of the speakers- positive to positive.
Jimr
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Greg Heumann
1108 posts
Apr 16, 2011
9:19 AM
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edit:- I just re-read the original post and you have TWO 10's and a 12 - so my example below doesn't tell you much about your system. Nevertheless I think it is educational so I'll leave it as a hypothetical case.
You have to know what impedance range your amp is happy with. Then you have calculate the impedance of the speaker system. For that you have to know the impedance of each speaker. Then you have to know that for two speakers in series, the impedance is R1+R2. For 2 speakers in parallel, the formula is R1*R2/(R1+R2) - so an 8 ohm speaker and a 4 ohm speaker in parallel give you 32/12=2.66 ohm impedance. When you have more than 2 speakers, calculate the impedance for a pair based on how that pair is wired, then treat that answer as 1 speaker and calculate the 3rd based on how it is wired to the pair.
Let's assume (and the example below is the most common)
a) Your amp wants an 8 ohm load
b) The two speakers are either each 16 ohm speakers wired in parallel, or 4 ohm speakers wired in series. Either way, their combined impedance is 8 ohms at the moment.
c) Your 15" speaker is 8 ohms.
If you wired it in parallel with one of the existing speakers (which is what you did by hooking it up with alligator clips) AND the 4 ohm speakers are wired in series, the impedance drops to 6.66 ohms.
If you wired it in parallel with one of the existing speakers (which is what you did by hooking it up with alligator clips) AND the existing 16 ohm speakers are wired in parallel, the impedance drops to 4 ohms.
The former case is probably OK; the latter case might be hard on the amp as it will double the current that is allowed to flow.
At least, I think so........
Last Edited by on Apr 16, 2011 9:22 AM
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Joe_L
1207 posts
Apr 16, 2011
10:18 AM
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Ask the builder, Scott Berberian. He is willing to help owner s of his amps.
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NiteCrawler .
124 posts
Apr 17, 2011
4:01 AM
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Thanks Again Guys,I appreciate the input.
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NiteCrawler .
125 posts
Apr 17, 2011
4:01 AM
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Thanks Again Guys,I appreciate the input.
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